[issue43908] array.array should remain immutable: add Py_TPFLAGS_IMMUTABLETYPE flag

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

In Python 3.11, 68 heap types have the Py_TPFLAGS_IMMUTABLETYPE flag:

* _blake2.blake2b
* _blake2.blake2s
* _bz2.BZ2Compressor
* _bz2.BZ2Decompressor
* _csv.Dialect
* _csv.reader
* _csv.writer
* _dbm.dbm
* _gdbm.gdbm
* _hashlib.HASH
* _hashlib.HASHXOF
* _hashlib.HMAC
* _lsprof.Profiler
* _lzma.LZMACompressor
* _lzma.LZMADecompressor
* _md5.md5
* _multibytecodec.MultibyteCodec
* _multibytecodec.MultibyteIncrementalDecoder
* _multibytecodec.MultibyteIncrementalEncoder
* _multibytecodec.MultibyteStreamReader
* _multibytecodec.MultibyteStreamWriter
* _overlapped.Overlapped
* _queue.SimpleQueue
* _sha1.sha1
* _sha256.sha224
* _sha256.sha256
* _sha3.keccak_224
* _sha3.keccak_256
* _sha3.keccak_384
* _sha3.keccak_512
* _sha3.sha3_224
* _sha3.sha3_256
* _sha3.sha3_384
* _sha3.sha3_512
* _sha512.sha384
* _sha512.sha512
* _sre.SRE_Scanner
* _ssl.Certificate
* _ssl.MemoryBIO
* _ssl.SSLSession
* _ssl._SSLContext
* _ssl._SSLSocket
* ssl.SSLError
* _thread.RLock
* _thread._local
* _thread._localdummy
* _thread.lock
* _tokenize.TokenizerIter
* _winapi.Overlapped
* array.array
* array.arrayiterator
* functools.KeyWrapper
* functools._lru_cache_wrapper
* functools._lru_list_elem
* functools.partial
* mmap.mmap
* operator.attrgetter
* operator.itemgetter
* operator.methodcaller
* pyexpat.xmlparser
* re.Match
* re.Pattern
* sqlite3.Connection
* sqlite3.Cursor
* sqlite3.PrepareProtocol
* sqlite3.Row
* sqlite3.Statement
* unicodedata.UCD

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43908>
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